Using Rebar for Concrete Deck Footings
Plain concrete deck foundations without rebar are acceptable under the minimum standards of construction established in the International Residential Code. However, placing reinforcing steel within footings is a relatively easy and inexpensive practice that can provide increased performance. Footings with large bearing areas or unstable soil can benefit from adding rebar to prevent cracking.
When rebar is placed within a footing, it should be completely encased in concrete by a minimum of 3 inches on all sides. When rebar is allowed to project out of the footings, it is susceptible to more rapid corrosion. Over time, rebar allowed to corrode into the footing can weaken the footing, creating areas subject to cracking.

Cutting a Concrete Pad
Learn how to use a concrete saw to cut a hole in a patio slab to install a deck footing.
Buried Post
Learn how to install a concrete deck footing with a buried treated support post as an alternative to a solid pier foundation.
Working With Concrete
Learn tips from the pros on how to mix and pour concrete for deck footings.
How to Decorate Deck Support Columns
Browse some examples of decorative deck support posts for tall decks.
Determining Deck Beam Height
Learn how to measure in order to set your posts to properly position your deck beam to the correct height. We recommend sloping your deck to shed water away from the house.
How to Splice a Deck Beam Over a Support Post
Follow our step by step tutorial for splicing a deck beam over a support post. Never split a beam in the center of a span.
More Helpful Resources
Explore Articles by Topic

Footings
Information related to installing frost footings for decks

Framing
Learn structural framing methods

Decking
Learn about wood and composite decking materials

Stairs
An in-depth look at the complex issue of how to build stairs

Railings
How to install guardrails and handrails to meet IRC code

Features
An overview on water drainage, benches, planters and lights

Design
The basics of deck design

Planning
Learn about permits and working with contractors

Porches & Patios
Build a covered deck to enjoy all seasons

Ledger
Proper attachment techniques

Care
Maintain your deck to maintain your investment

Materials
An overview on water drainage, benches, planters and lights
How many footings do I need?
Avoid a wobbly deck! Learn how to calculate the right number of footings to keep your structure safe and solid.
Installing footings on a sloped yard
Our inspector explains how to install concrete deck footings on uneven ground.
Can I use pier blocks?
Our inspector explains the pros and cons of using pier blocks for deck foundations.
Why is Joist Protection so Important for Your Deck?
If you’ve ever seen a piece of wood left out in the weather for any period of time, you know what happens: decay. Whether through wet rot, insect damage, or mildew, the fibers begin to break down.
Deck Blocking: Spacing, Methods, and How to Install Like a Pro
Learn the importance of deck blocking and how to install it when building your deck.
How to Slope a Deck for Water Runoff and Drainage
Learn if your deck needs to be sloped and how to do it.
Explore Articles by Topic

Footings
Information related to installing frost footings for decks

Framing
Learn structural framing methods

Decking
Learn about wood and composite decking materials

Stairs
An in-depth look at the complex issue of how to build stairs

Railings
How to install guardrails and handrails to meet IRC code

Features
An overview on water drainage, benches, planters and lights

Design
The basics of deck design

Planning
Learn about permits and working with contractors

Porches & Patios
Build a covered deck to enjoy all seasons

Ledger
Proper attachment techniques

Care
Maintain your deck to maintain your investment

Materials
An overview on water drainage, benches, planters and lights